mineral
Clear quartz (rock crystal)
Quartz, silicon dioxide (SiO₂)
AI-generated identification · may be incorrectColorless to milky, translucent, with a glassy luster and irregular fracture; Mohs hardness 7. Quartz has a trigonal crystal structure, but this rough fragment shows no obvious crystal faces; specific gravity is about 2.65.
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Physical properties
Colorless to milky, translucent, with a glassy luster and irregular fracture; Mohs hardness 7. Quartz has a trigonal crystal structure, but this rough fragment shows no obvious crystal faces; specific gravity is about 2.65.
Formation & geological history
Quartz crystallizes from silica-rich fluids in igneous and metamorphic settings and also occurs in veins and cavities. It is a common mineral formed throughout Earth’s geological history.
Uses & applications
Used in jewelry, ornaments, abrasives, glassmaking, and electronic components; this small rough fragment is mainly suitable for collecting.
Geological facts
Quartz is one of Earth’s most abundant minerals and is piezoelectric, producing an electrical charge under pressure.
Field identification & locations
The specimen appears to be a small, clear-to-cloudy quartz fragment, though identification from the image alone is limited. Quartz is widespread in many rock types and is recognized by its hardness, glassy appearance, and lack of cleavage.
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Granite
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